The 250g Vari-Layer Liner offers maximum warmth with minimum weight. This liner is compatible with all liner system rugs and can be easily used to increase warmth during colder spells. This liner has a polyester outer and lining and has layered fiberfill for maximum heat retention. The Vari-Layer liner attaches by Velcro loops to the neck area of the outer blanket, and clips onto the back corners to prevent the liner from slipping. This liner can be easily washed in a domestic washing machine.